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Science · 2026 · 2 marks
CBSE 2026 · Region 3 · Set 1 · Q34
Attempt either (a) or (b) :What happens when light is scattered from (i) very fine particles and (ii) very large size particles of medium ? Justify your answer in each case.With the help of a ray diagram, explain any phenomenon of formation of spectrum in nature.
Attempt either (a) or (b) :
What happens when light is scattered from (i) very fine particles and (ii) very large size particles of medium ? Justify your answer in each case.
With the help of a ray diagram, explain any phenomenon of formation of spectrum in nature.
Marking-scheme solution
(a) (i) Mainly blue coloured light is scattered because very fine particles scatter shorter wavelength.
OR(ii) Scattered light may appear white because very large size particles scatter light of all wavelengths.
A natural spectrum like rainbow is formed when sunlight passes through tiny water droplets present in the atmosphere. The water droplets disperse the incident light ray, then reflect it internally and finally refract it again when it comes out of the raindrop.More from The Human Eye and the Colourful World
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CBSE Class 10 Science past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.